Improvement in steam-boilers



Patented Apri! 16, 1878.

l C" l l f l M l -oooooo0" i "L. SHOOK. Steam-Boiler.

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hmuevo'ri Umm N. FEERS. FHOT0-UTHOGRAFH WASHINGTON D C UNITED STATESPATENT OFFICE.

LEVI SHOCK, PITTSBURG, PENNTSYLVANIA.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming partrof Letters Patent No. 202,382, dated April16, 1878 application filed December 12, 1877.

To all whom it may concern:

Be it known that I, LEvI SEooK, of Pittsburg, in the county of Alleghenyand State of Pennsylvania, have invented a new and useful Improvement inSteam-Boilers, of which the following is a specification, referencebeing had to theaccompanying drawings.

The invention relates to an improvement in steam-boilers; and consistsin so arranging the plates thereof that the riveted joints shall not beexposed to the action of the lire.

In the accompanying drawing, which represents a perspective view of theinvention, B and C indicate the plates composing the boiler, and are ofthe contour shown.

The plate B is of sufficient lengt-h to almost completely encircle theboiler, and has its ends vcut at an acute angle to the horizontal edgesof the plate, the line of the angle diverging upward and inward. Thuswhen the plate is in position its lower corners almost meet, while theremaining portions of its ends are separated,constructing a space in theform of an inverted equilateral or isosceles triangle, according to thewidth of the plate, which space is completely filled by thesimilarlyformed plate (l, having its ends also cut at an anglecorresponding with the ends of the plate B.

Thesheets or plates B C are punched and then riveted together by thepunching and riveting process heretofore practiced.

rlhe advantage of cutting the plates in the m anner hereinbeforedescribed is to strengthen the boiler, by having the angle of force ofthe strain upon their riveted ends at an acute angle to the longitudinalplane of its axis.

The purpose of the arrangement ofthe plates B C is to keep the seams ofthe boiler from coming in contact with the more intense part of the re,and thereby preserve them from being burned off, thus dispensing with adefect to which the ordinary steam-boilers are subjeeted.

I am aware that a steam-boiler composed of plates the edges of which arecut obliquely to the axis of the boiler 'are old, and I do not,therefore, claim such device broadly; but

What I do claim as my invention, andl desire to secure by LettersPatent, is-

l. In a steam-boiler, the combination of the plate B with the triangularplate C, arranged substantially as shown and described.

2. Thesteam-boilerAconstructed from the plates B C, the plate B almostcompletely encircling the boiler, and having its ends cut at an angle,and the plate C being of triangular form,`and completely filling thespace between the ends of the plate B, substantially as expressed.

In testimony that I claim the foregoing impro vement in steam-boilers,as above described, I have hereunto set my hand.

LEvI sHooK.

Witnesses M. F. CAssInY, GEORGE EVANS.

